<audio style="display:none; height: 0" id="bg-music" preload="auto" src="../static/videos/bg-music.mp3" loop="loop"></audio>
document.addEventListener('DOMContentLoaded', function () {
function audioAutoPlay() {
var audio = document.getElementById('bg-music');
audio.play();
document.addEventListener("WeixinJSBridgeReady", function () {
audio.play();
}, false);
}
audioAutoPlay();
});